Crashing Habbo Server... not impossible actually

As some peaple knows crashing a habbo server is imposible because it is by shock wave, but as an other lil amount knows it is posible by traping ports.
When some one traps a port (advanced hacking but easy for pros) when any other person trys to login the server disconnect all ppl online because ports are closed and they are not suposed to be there so the server goes down... and if the web page is in the same PC of the server it will close too.
How to evite it? no idea, from now the only way is... shuting down the server computer xD.
Well cya.